Datasheet LTC3775 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | High Frequency Synchronous Step-Down Voltage Mode DC/DC Controller |
| Seiten / Seite | 34 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Pulse-Skipping Mode Waveform. … |
| Dateiformat / Größe | PDF / 553 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Pulse-Skipping Mode Waveform. Switching Frequency vs. with 0.1A Load
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LTC3775
TYPICAL PERFORMANCE CHARACTERISTICS Pulse-Skipping Mode Waveform Switching Frequency vs with 0.1A Load Output Short-Circuit Waveform Temperature
550 540 VOUT(AC) 530 100mV/DIV IL 20A/DIV 520 510 0A LOAD IL 500 2A/DIV 490 V 480 SS 1V/DIV VSW SWITCHING FREQUENCY (kHz) 470 10V/DIV 460 450 5μs/DIV 3775 G10 VIN = 12V 20μs/DIV 3775 G25 V –50 –25 0 25 50 75 100 125 IN = 12V VOUT = 1.2V VOUT = 1.2V TEMPERATURE (°C) LOAD = 0.1A CSS = 0.01μF 3775 G11 MODE/SYNC = INTVCC FIRST PAGE CIRCUIT SW FREQ = 500kHz FIRST PAGE CIRCUIT
Duty Cycle vs VCOMP ILIMT vs Temperature ILIMT vs Input Voltage
100 110 110 VIN = 5V VIN = 12V VIN = 24V 90 108 108 80 106 106 70 104 104 VIN = 40V 60 102 102 50 (μA) 100 (μA) 100 40 I LIMT 98 I LIMT 98 DUTY CYCLE (%) 30 96 96 20 94 94 10 92 92 0 90 90 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 –50 –25 0 25 50 75 100 125 4 8 12 16 20 24 28 32 36 40 VCOMP (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3775 G12 3775 G13 3775 G14
Shutdown Current vs ILIMB vs Temperature IRUN vs Temperature Input Voltage
11.0 0 35 10.8 –0.2 30 10.6 –0.4 10.4 –0.6 25 10.2 –0.8 20 (μA) 10.0 (μA) –1.0 I LIMB 15 9.8 I RUN –1.2 9.6 –1.4 INPUT CURRENT (μA) 10 9.4 –1.6 5 9.2 –1.8 9.0 –2.0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 4 8 12 16 20 24 28 32 36 40 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3775 G15 3775 G16 3775 G17 3775fa 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
TYPICAL PERFORMANCE CHARACTERISTICS Pulse-Skipping Mode Waveform Switching Frequency vs with 0.1A Load Output Short-Circuit Waveform Temperature
550 540 VOUT(AC) 530 100mV/DIV IL 20A/DIV 520 510 0A LOAD IL 500 2A/DIV 490 V 480 SS 1V/DIV VSW SWITCHING FREQUENCY (kHz) 470 10V/DIV 460 450 5μs/DIV 3775 G10 VIN = 12V 20μs/DIV 3775 G25 V –50 –25 0 25 50 75 100 125 IN = 12V VOUT = 1.2V VOUT = 1.2V TEMPERATURE (°C) LOAD = 0.1A CSS = 0.01μF 3775 G11 MODE/SYNC = INTVCC FIRST PAGE CIRCUIT SW FREQ = 500kHz FIRST PAGE CIRCUIT
Duty Cycle vs VCOMP ILIMT vs Temperature ILIMT vs Input Voltage
100 110 110 VIN = 5V VIN = 12V VIN = 24V 90 108 108 80 106 106 70 104 104 VIN = 40V 60 102 102 50 (μA) 100 (μA) 100 40 I LIMT 98 I LIMT 98 DUTY CYCLE (%) 30 96 96 20 94 94 10 92 92 0 90 90 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 –50 –25 0 25 50 75 100 125 4 8 12 16 20 24 28 32 36 40 VCOMP (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3775 G12 3775 G13 3775 G14
Shutdown Current vs ILIMB vs Temperature IRUN vs Temperature Input Voltage
11.0 0 35 10.8 –0.2 30 10.6 –0.4 10.4 –0.6 25 10.2 –0.8 20 (μA) 10.0 (μA) –1.0 I LIMB 15 9.8 I RUN –1.2 9.6 –1.4 INPUT CURRENT (μA) 10 9.4 –1.6 5 9.2 –1.8 9.0 –2.0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 4 8 12 16 20 24 28 32 36 40 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3775 G15 3775 G16 3775 G17 3775fa 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS